OSDev/Using obs service gbs for local build

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This guide describes using sources and building packages using OBS source service gbs.

Installing prerequisites

By default osc cannot checkout sources referenced through gbs service. For it to work following packages have to be installed: 

git clone https://github.com/01org/obs-service-gbs.git
cd obs-service-gbs
python setup.py build
sudo python setup.py install

git clone https://github.com/01org/obs-service-git-buildpackage.git
cd obs-service-git-buildpackage
python setup.py build
sudo python setup.py install

Configuring services

To make services work without root privileges, cache directories have to be changed. Edit files /etc/obs/services/gbs and /etc/obs/services/git-buildpackage. Uncomment string containing repo-cache-dir and change it to place where your user have rights to write to (/var/tmp for example): 

repo-cache-dir = /var/tmp/git-buildpackage-repos/

This string can be the same in both files.

Checking out sources and building

Now you can run command in package directory 

osc service run

to prepare sources for building and normally run 

osc build $REPO $ARCH

to build package.

Known issues

Multiple .spec files in repo

If you have following error: 

Multiple build description files found:

build can be fixed by adding one of .spec files as additional parameter to command line: 

osc build $REPO $ARCH $name.spec

Upstream branch problem

Following error: 

error: Start commit '*' not an ancestor of end commit '*'
error: Generating upstream tarball and/or generating patches failed. GBS tried this as you have upstream branch in you git tree. Fix the problem by either:
  1. Update your upstream branch and/or fix the spec file. Also, check the upstream tag format.
  2. Remove or rename the upstream branch (change the package to native)
See https://source.tizen.org/documentation/reference/git-build-system/upstream-package for more details.
source_service:error: GBS export failed: <gbs>Failed to export packaging files from git tree

caused by upstream branch in git source tree can be fixes by applying patch to obs_service_gbs. In file command.py in string containing no_patch_export change None to 1: 

...
'source_rpm': None,
'no_patch_export': 1,
'upstream_branch': None,
...

Then rebuild and install obs_service_gbs (step #Installing prerequisites)

Configuring ssh

Errors, caused by ssh: 

source_service:error: RepoCache: Failed to fetch from remote: Error running git fetch: ssh: connect to host review.tizen.org port 22: Connection timed out
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

or 

source_service:error: RepoCache: Failed to fetch from remote: Error running git fetch: Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

can be fixed by changing /etc/ssh/ssh_config file. Add following lines before Host *: 

Host review.tizen.org
 IdentityFile /path/to/your/ssh/key
 Port 29418
 User $username
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